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Author ORCID Identifier
N/A
AccessType
Open Access Dissertation
Document Type
dissertation
Degree Name
Doctor of Philosophy (PhD)
Degree Program
Polymer Science and Engineering
Year Degree Awarded
2016
Month Degree Awarded
September
First Advisor
E. Bryan Coughlin
Second Advisor
Kenneth Carter
Third Advisor
S. Thayumanavan
Abstract
Organic photovoltaics are a promising low-cost alternative to traditional monocrystalline silicon photovoltaics. The active layer materials are conjugated organic materials, typically polymers. We describe several new series of p-type (donor) conjugated polymers, which we have used to evaluate structure-property relationships in an effort to improve OPV efficiencies. Specifically, our interest was directed towards the effect of fluorination on various conjugated polymers, as this has recently become a valuable tool for modifying polymer electrochemical properties and improving performance. In an effort to reduce the synthetic complexity of such conjugated polymers, decrease cost, and to embrace more environmentally friendly protocols, we have synthesized our materials using newer Direct Arylation Polymerization (DArP) techniques. With DArP, we have synthesized poly(thieno[3,4-b]thiophene-co-benzodithiophene), poly(diketopyrrolopyrrole)s and P(3HT-co-3H4FT)s with high molecular weight, with low percentages of structural defects. Furthermore, we have demonstrated that these materials perform equally to those synthesized by mainstream coupling methods such as GRIM, Stille or Suzuki coupling.
DOI
https://doi.org/10.7275/8680533.0
Recommended Citation
Homyak, Patrick D., "Fluorinated Conjugated Polymers for Organic Photovoltaics: Synthesis by Direct Arylation and Structure-Property Relationships" (2016). Doctoral Dissertations. 718.
https://doi.org/10.7275/8680533.0
https://scholarworks.umass.edu/dissertations_2/718